Boiler-flue-setting device.



F. -SCHMITT. BOILER FLUE SETTING DEVICE.

APPLICATION FILED APR. 3.19I6.

Patented Apr. 17 1917.

'wuwwtoz may Jdm .iwcru urnov. wAsmucmnl n c UNITED %TATE% ATENT FFICFQO FREDERICK SCHMITT, 0F POGATELLO, IDAHO.

BOILER-FLUE-QETTING DEVICE.

Application filed April 3, 1916.

To all whom it may concern:

Be it known that I, Fnnnnnicn SoHMiT'r, a citizen of the United States, residing at P0- catello, in the county of Bannock and State of Idaho, have invented certain new and useful improvements in Boiler-Flue-Setting Devices, of which the following is a specification.

ihis invention has to do with fastening means for the fines of steam boilers of various types of construction and involves further improvements in fastening devices of the kind described in my previous United States Patents 953,062 issued March 29, 1910, and 1,089,970 issued March 10, 1914:.

The primary object of my efforts in producing a practical and efiective fastening means has been to eliminate the common defect of such means as heretofore employed, namely the leakage at the connection of the fiues with the flue sheet due primarily to the fact that the distortion of the sheet incident to expansion. and contraction ordinarily destroys the efficiency of the connection established by the fastening means.

While my present improvements in a broad way are quite similar to the constructions shown in my previous patents, I have modified. in a peculiar way the detail construction of certain. parts heretofore employed .vhereby to subserve the object desired to accomplished as hereinbefore pointed out.

\Vith the foregoing in view, a complete comprehension of the details of the improvements of this invention will be had upon consulting the description found hereinafter in connection with the annexed drawings, in which- Figure 1 is a sectional view showing in assembled relation a flue sheet, a fine, and the fastening means constituting the invention.

Figs. 2, 3, t and 5 are views in elevation, section and partial section of the clamping and securing member, flue sheet bushing and flue parts according to the fo mation necessary for the purposes of the invention.

A in the drawings denotes the flue sheet which is provided with a suitable number of flue openings threaded as seen at 0; in Fig. 3, and B desi nates the flue the end of which is threaded internally as shown at b in Fig. 5. To afford the connection intermediate the parts A and B I contemplate using the two main parts which 1 have always here- Specification of Letters Patent.

. Patented Apr; 17, 1917.

Serial No. 88,650.

toforo employed, namelv the tubular clamping and securing member 1 and the bushing 2, the latter being externally threaded at 2" so as to screw tightly into the threaded portlon a of the fine sheet A. The bushing 52 is provided. with an annular collar or projection 2 adapted to be seated against the inner wall of the flue sheet when the bushng is screwed home in the threaded opening a. Internally the bushing 2 is provided with the main seat 8, the outer end scat and the inner end seat 5.

The clamping and securing member 1 is formed at its outer end with an annular enlargement 6, and is externally threaded for a considerable distance from its inner end, as shown at 1. Furthermore, the member 1 is formed with the tapering shoulder 1" adapted to fit snugly against the contracted or tapering seat 3 of the bushing. The threaded portion 1 of the member 1 is adapted to engage the threaded portion 6 of the flue B, and the parts when assembled appear as seen in Fig. 1 of the drawmgs.

On reference to this figure it will be noted that the outer end of the flue B is received and held hard against the seat 5 of thebushing 2 by the clamping or securing action of the member 1, that the member 1 itself by its cooperation. with the flue B is maintained with its tapered shoulder 1 frictionally and tightly engaged with the seat 3 of the bushing 2, and that the enlargement 6 is positively and firmly engaged with the seat a of the bushing. It will also be apparent that the outer end of the fine B is clamped eifectively not only against and in the seat 5 but between the bushing 2 and the member 1, and that the parts 13, 1 and 2 have relatively large contacting surfaces which increase the efficiency of the connection in a material manner and reduce to a minimum the liability of disturbance of the connection incident to contraction. and expansion of the parts and consequent distortion. Little or no opportunity is afforded for flexing or misshapement of the securing or connecting parts owing to the fact that the engagement etween the parts B, 1, 2 and 3 is rigid practically throughout the contacting or interen gaging portions of said parts.

The projection 2 tapers considerably, as

does the shoulder 1:

An essential detail feature of construction resides in provlding the bushlng 2 wlth the external left hand threads 2 and the member 1 with external right hand threads 1, so that the screwing of the part 1 into the flue B does not tend to displace the bushing 2.

Having thus described the invention, what isclaimed as new is 1. In combination, a flue sheet provided with a fine opening, a bushing disposed in said opening, a flue having an end thereof seated against said bushing, and a clamping and securing member connected with the flue and formed with one end portion engaging an end of the bushing and having wedging engagement with the bushing for some distance from the said abutting end portions to establish connection between the fluc and flue sheet.

2. In combination, a flue sheet provided with a flue opening, a bushing disposed at said opening, a flue seated against said bushing, said bushing having an internally contracted seat portion extending substantially the width of the flue sheet and a clamping and securing member connected with the flue and having wedging engage ment throughout the said contracted portion of the bushing.

3. In combination, a flue sheet having a flue opening, a bushing screwed into said opening at the inner side of the flue sheet, a flue having its end seated against said bushing, the bushing being formed with an internal and inwardly contracted portion corresponding in extent substantially to the width of the flue sheet, and a clamping and securing member screwed into the flue and formed with a tapering external portion adapted to fit tightly in wedging contact throughout the surface of the contracted portion of the bushing.

4; In combination, a flue sheet having a flue opening, a bushing screwed into said opening at the inner side of the flue sheet, a flue having its end seated against said bushing, the bushing being formed with an internal and inwardly contracted portion, and a clamping and securing member screwed into the flue and formed with a tapering external portion adapted to fit tightly in wedging engagement with the contracted portion of the bushing, said clamping and securing member being formed with an enlargement at the outer side of the flue sheet having a bearing against the adjacent end of the bushing.

5.- In combination, a' fine sheet formed with a threaded flue opening, a bushing externally threaded and screwed into; said opening and formed with a collar engaging the inner wall of the flue sheet, said bushing having an internal contracted portion intermediate its ends and seats at its opposite ends, a flue seated against the seat at the inner end of the bushing, and a clamping and securing member connected with the flue and foaned with a tapering external portion adapted to wedge tightly into said contracted portion of the bushing and also formed with an enlargement at its outer end adapted to seat against the seat at the outer end of the bushing.

6. In combination, a flue sheet provided with a flue opening, a bushing adapted for insertion in said opening from one side of the flue sheet and having an internal contracted portion forming a seat, said contracted portion terminating at one end in an end seat, a flue engaged with the other end of the bushing from said last mentioned seat, and a clamping and securing member adapted for insertion in the flue sheet from the side opposite the insertion of the bushing and formed with a tapering external seat corresponding to the contracted portion aforesaid for wedging engagement therewith, said clamping and securing member having at one end an enlargement, the surface of which conforms to the end seat with which it is engageable.

7.7111 combination, a flue sheet provided with a flue opening, a bushing received in said opening and formed with a flue seat at one end, a flue seated at an end thereof against said seat of thebushing, a clamping and securing member passing through the bushing from the outer end thereof and having wedging engagement with the bushing intermediate the ends of the latter, the bushing being formed with an annular projection at its inner end in engagement with the inner wall of the flue sheet and the clamping and securing member being formed with an annular enlargement at its outer end seated against the outer end of the bushing.

In testimony whereof I aflix my signature.

FREDERICK SCHMITT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. G." 

